.\" zip_set_file_extra.mdoc \-- set extra field for file in zip
.\" Copyright (C) 2006-2011 Dieter Baron and Thomas Klausner
.\"
.\" This file is part of libzip, a library to manipulate ZIP files.
.\" The authors can be contacted at <libzip@nih.at>
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.TH ZIP_SET_FILE_EXTRA 3 "February 13, 2011" NiH
.SH "NAME"
zip_set_file_extra \- set extra field for file in zip
.SH "LIBRARY"
libzip (-lzip)
.SH "SYNOPSIS"
#include <zip.h>
.PP
int
zip_set_file_extra(struct zip *archive, zip_uint64_t index); \
"const char *extra" "int len"
.SH "DESCRIPTION"
The
zip_set_file_extra
function sets the extra field for the file at position
\fBindex\fR
in the zip archive to
\fBextra\fR
of length
\fBlen.\fR
If
\fBextra\fR
is
\fBNULL\fR
and
\fBlen\fR
is 0, the file extra field will be removed.
.SH "RETURN VALUES"
Upon successful completion 0 is returned.
Otherwise, \-1 is returned and the error information in
\fBarchive\fR
is set to indicate the error.
.SH "ERRORS"
zip_set_file_extra
fails if:
.RS
.TP 4
[ZIP_ER_INVAL]
\fBindex\fR
is not a valid file index in
\fBarchive,\fR
or
\fBlen\fR
is less than 0 or longer than the maximum extra field length in a zip file
(65535).
.TP 4
[ZIP_ER_MEMORY]
Required memory could not be allocated.
.RE
.SH "SEE ALSO"
libzip(3),
zip_get_file_extra(3)
.SH "AUTHORS"

Dieter Baron <dillo@giga.or.at>
and
Thomas Klausner <tk@giga.or.at>
